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How to replace cmos battery on hp zt3300 laptop

How do I replace the cmos battery on a hewlette Packard zt3300 laptop? The clock and date keep reverting back to 2002

Posted by Anonymous on


6 Suggested Answers

  • 2 Answers

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: date keeps reverting to 10/08 and clock won't keep time

i donno much........ may be ur comp inbuilt[battery used 4 time setting] battery would hav run out....... i think so

Posted on May 11, 2009

  • 49 Answers

SOURCE: date reverting back to 2002

Your cmos battery more than likely needs replacing. The cmos battery is a small watch battery that keeps the time and date on your computer, if it runs out and the battery or cable is unplugged then the motherboard has no power and can't keep the clock ticking, so to speak. If it's a PC it's very easy to do. Just open the side of the case, look for the very obvious watch battery inside, pop it out and take it down to your local jewelers or computer store for a replacement.

Laptops, on the other hand, are more hassle, it's replacable but requires more effort to locate and remove, and it's harder to find a replacement.

What type of computer are you using? If it's a laptop please state the make and model.

Posted on Aug 04, 2009

  • 553 Answers

SOURCE: While using the laptop on battery it unexpectedly

aside from the battery (big one) there is another battery connected to your motherboard, it is not accessible unless you open the casing of your laptop.

bring it to a service center and have it replace(it is almost a size of a watch battery)

Posted on Nov 05, 2009

  • 484 Answers

SOURCE: my hewlett packard laptop won't

try to plug the laptop to a power supply for a while, then try to turn it on. if it does the same thing, try to remove the battery then reinstall it back in, then try to turn it on again.

Posted on Jan 02, 2010

  • 155 Answers

SOURCE: I need to replace the cmos battery in my Advent 9115 laptop, how is this done?

you will need to open up the laptop and locate a small battery connected with a plug. once you replace the battery, you'll need to set up the bios again and save. restart normally.

Posted on Mar 23, 2013

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Here is the service manual for your laptop. The Cmos and password procedures are on Page 42. Basically, power down, remove the laptop battery, then remove the cmos battery, wait 10-15 minutes and replace the batteries. The cmos at this time will be reset. Make sure to enter the bios after this and reset your time and date.


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